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GATE 2025 ME – Question 9

General Aptitude · Spatial Aptitude: Spatial Reasoning and Visualization · 2 marks · Multiple choice

Which one of the following options has the correct sequence of objects arranged in the increasing number of mirror lines (lines of symmetry)?

  1. Circle; Square; Equilateral triangle; Isosceles triangle
  2. Isosceles triangle; Equilateral triangle; Square; Circle
  3. Equilateral triangle; Isosceles triangle; Square; Circle
  4. Isosceles triangle; Square; Equilateral triangle; Circle

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Show answer and explanation

Correct answer: (B) Isosceles triangle; Equilateral triangle; Square; Circle

Explanation

An isosceles triangle has 1 line of symmetry, an equilateral triangle has 3, a square has 4 and a circle has infinitely many. So the increasing order is isosceles triangle, equilateral triangle, square, circle.